61373523501563 has 48 divisors (see below), whose sum is σ = 77592541118400. Its totient is φ = 48114752716800.

The previous prime is 61373523501559. The next prime is 61373523501599. The reversal of 61373523501563 is 36510532537316.

It is not a de Polignac number, because 61373523501563 - 2² = 61373523501559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61373523504563) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29545403 + ... + 31554363.

It is an arithmetic number, because the mean of its divisors is an integer number (1616511273300).

Almost surely, 2^{61373523501563} is an apocalyptic number.

61373523501563 is a deficient number, since it is larger than the sum of its proper divisors (16219017616837).

61373523501563 is a wasteful number, since it uses less digits than its factorization.

61373523501563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009428 (or 2009421 counting only the distinct ones).

The product of its (nonzero) digits is 5103000, while the sum is 50.

The spelling of 61373523501563 in words is "sixty-one trillion, three hundred seventy-three billion, five hundred twenty-three million, five hundred one thousand, five hundred sixty-three".